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stick key in driver door lock and unlock it. If that works, now see if the remote will unlock the door or doors..i remember reading in an owners manual once where you can program which doors open and close by they way you press and hold down the two main buttons, also after a battery change in the remote, i think, but not sure, i did this on a blazar i once owned... the owners manual said, that you had to be within 20 feet and press and hold down both buttons till it makes the arming sound.... Can i get some feedback cause im curious..thanks.

SynchronizationWhenKey buttons operated repeatedly while vehicle out of range and system becomes inoperative.HowPolo: Press key unlock button for approximately 1 second. Golf/Bora: Press key lock or unlock button for approximately 1 second. Manually lock or unlock vehicle. System should now lock or unlock vehicle. If not, carry out programming procedure.ProgrammingWhenKey added or replaced. System malfunction.How - PoloKeys can only be programmed using diagnostic equipment.NOTE: A maximum of 4 keys can be programmed.How - Golf/Bora98MYKeys can only be programmed using diagnostic equipment.NOTE: A maximum of 4 keys can be programmed.How - Golf/Bora 99MY

Turn radio on, 1000 will appear on the screen, the first preset button press till first number of code shows up, example press 3 times for 3, then and so on with the next preset button and code number.

You do not state year of car.This is for most golfs 98-06.
switch ignition on
insert key to be programmed into drivers door lock
lock vehicle manually
press lock or unlock button
wait at least 1second
press lock or unlock button again
vehicle horn sounds to indicate correct programming.
good luck,barry

Lets go. say the coed was 1234,Press button number 1 untill you got number one on your display.Then press number 2 until it shows on the display .Then press number three untill it shows on the display and the same for number 4.Hold down the last button until you here a bleep then you should be ok.